Osamu takahashi etal
nonlubricating type vane pump

ABSTRACT

A NONLUBRICATING TYPE VANE PUMP HAVING VANES WHICH ARE ROTATABLY FITTED ON A SHAFT AND WHICH ARE SUPPORTED BY CARBON SHOES IN A ROTOR IS PROVIDED WHEREIN THE VANES ARE COATED ON BOTH SURFACES THEREOF WITH A LUBRICATING MATERIAL OF HIGH VISCOSITY FOR REDUCING THE NOISE CAUSED BY THE SLIDING CONTACT OF THE VANE SURFACES ON THE CARBON SHOE DURING OPERATION OF THE VANE PUMP. SILICONE OIL OR SILICON GREASE OF HIGH VISCOSITY COATED ON BOTH SURFACES OF THE VANES OR COATED ON THE CARBON SHOES AS WELL HAVE BEEN TESTED AND FOUND TO SIGNIFICANTLY REDUCE NOISE DURING OPERATION OF THE PUMP.

DEFENSE/E PUBLECATEQN UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.6. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicafes the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of. alleged invention. The Patent Oilice make! no assertion as to the novelty 01 the disclosed subject matter.

PUBLISHED JANUARY 7, 1975 A nonlubricating type vane pump having vanes which are rotatably fitted on a shaft and which are supported by carbon shoes in a rotor is provided wherein the vanes are coated on both surfaces thereof with a lubricating material of high viscosity for reducing the noise caused by the sliding contact of the vane surfaces on the carbon shoes during operation of the vane pump. Silicone oil or silicon grease of high viscosity coated on both surfaces of the vanes or coated on the carbon shoes as well have been tested and found to significantly reduce noise during operation of the pump.

Jan. 7, 1975 QSAMU TAKAHAsHl ETAL T930,007

NONLUBRICATING TYPE VANE PUMP Filed March 28, 1974 

